Many Facebook apps post items on your page as if they were you. That gets annoying. To stop it, go to Facebook and click the arrow next to the “Home” button. Then choose “privacy settings.” Scroll down to “apps and websites” and click “edit.” Click “remove” to get rid of anything you don’t want.

If you see the word “required” next to a site or app, that means you can’t edit its settings. But you can delete the whole app.